Choose the correct word to fill in the gaps​

1 invented found out
a) When John found out that a research company wanted to buy his gadget, he couldn’t believe it.
b) Mike invented the device, but it was his brother who put it on the market.

2 colleagues employees
a) Professor Smith thanked his close colleagues for their support in his research.
b) The company’s business is growing, so it needs to hire more employees.

3 salary wage
a) The pizza delivery boy thought his wage was rather low for a full day’s work.
b) If Jane gets the promotion, it will add an extra four thousand pounds to her annual salary.

4 Geography Earth Science
a) Mary wants to travel to all those countries she studied in her Geography class.
b) Jason finds Earth Science fascinating, because he learns a lot of things about the formation and history of our planet.

5 raise lift
a) Jake’s back hurts because he tried to lift a very heavy box on his own.
b) You don’t have to raise your voice. I can hear you very well!

6 toddler infant
a) Of course Annie can’t talk yet; she’s just a four-month old infant!
b) Jamie is such a cute toddler! He’s just learning to walk and he keeps falling down all the time.